Combined type-writing and computing machine.



J. N. THORNTON.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

AIPHCATlON FILED APR.13| I912.

Patented Aug. 21, 1917.

2 SHEETS-SHEET I.

J. N, THORNTON.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 13. I912.

Patented Aug. 21, 1917.

2 SHEETS-SHEET 2.

U TED STATES r gENT oFrIoE.

JOHN N. THORNTON, OF JERSEY CITY, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MEN'I'S, TO UNDERWOOD COMPUTING MACHINE COMPANY, OF YORK, N. Y., A

CORPORATION OF NEW YORK.

COMBINED TYPE-WRITING AND COMPUTING MACHINE.

Specification of Letters Patent.

Patented Aug. 21, 1917.

Application filed April 13, 1912. Serial No. 690,488.

To all whom it may concern:

Be it known that I, J oHN N. THORNTON, a citizen of the United States, residing in J ersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Combined Type-Writing and Computing Machines, of which the following is a specification.

This invention relates to combined typewriting and computing machines of the class in which numeral keys on the typewriter are caused to set certain members or pins in the computing mechanism which are subsequently employed for rotating the computing wheels.

These pins are usually placed upon bars, one bar for eachdenomination; and the bars are displaced one after another as the typewriter carriage makes its letter feeding movements; a dog being connected to the typewriter carriage, and a set of jacks being operated seriatim by said dog, the jacks being connected to the corresponding computation pin bars to displace or set the same. When the carriage stands at any point, the computation pin bar of corresponding denomination is displaced or set, and when a numeral key of the typewriter is depressed to print a figure at that point, the corresponding pin is set upon the displaced computation bar. After the pins have been set on all the bars in this manner, a general operator is employed for turning all the dial wheels to an extent determined by means of the set pins.

According to the present invention, the computing mechanism may be silenced by effecting a separation between said computing dog on the carriage and said set ofjacks. This silencing is effected in a novel manner by devices connected to the case-shifting mechanism of the typewriting machines, so that when upper case characters are being written no computation will be done. Provision is also made for causing the tabulator keys to silence the computing mechanism. There is also provision for causing the back spacing dog to silence said computing. mechanism.

There is also provided near the keyboard a finger-piece which can be thrust back and locked in position to hold the computing dog silenced. A special key for returning the wheels to zero has means for releasing said computing dog automatically, so that it 1s insured that at the beginning of any computmg operation the computing dog or dogs shall be rendered effective. There is also provlded upon the machine another special key which is operated to Write upon the work sheet a special character. This key can operate only when all the dial wheels stand at zero; and therefore the appearance of said special character on the work sheet indicates that the Wheels stood at zero when said character was imprinted. This special key also has means for rendering the computing dog effective. Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a sectional, central, longitudinal view taken from front to rear of an Underwood-Hanson combined typewriting and computing machine embodying the present improvements in one form.

Fig. 2 is a rear elevation, showing the computing dog on the carriage and associated parts, one dog being shown in use while another is dropped.

Fig. 3 is a side elevation of a device for locking in effective position the device which returns the computation dog or dogs.

Fig. 4 is a perspective rear view, showing the computation dog, means for rendering it effective, and keys connected to silencing means for said dog.

Fig. 5 is a sectional side elevation, illustrating the computation dog and the manner in which it is mounted and controlled.

The typewriter comprises numeral keys 1 and alphabet keys 2, which depress levers 3 to vibrate bell cranks 4; the latter engaging type bars 5 to swing them up to strike against a platen 6 mounted on a carriage 7 The carriage is driven by a spring barrel 8, and its letter feeding movements are controlled by a rack 9, which meshes with a pinion 10 connected to an escapement wheel 11, whose movements are controlled by dogs 12, said dogs operated by a'universal bar 13 1Zvhich is actuated by heels 14 on the type ars.

The numeral keys have stems 15 to engage and depress arms 16 on rock shafts 17 forming parts of linkages 1'7 to depress or set computation pins 18 on bars 19, which extend forwardly and rearwardly and have The typewriter carriage 7 is connected with means to raise the computation racks or bars 19 seriatim, so that when said carriage is in position for writing at any point in a column, the computation bar of the corresponding denomination will be raised; and hence when a numeral key is depressed, to write at said point in the column, the linkage 17 connected to said key will depress that particular pin 18 on the lifted bar 19 which corresponds to such depressed key.

The pins when depressed are utilized for determining the turning of the computation wheels 22; the racks 19 being for this urpose driven. by a general operator, w ich may comprise a handle 23 connected to a shaft 24, on whose ends are fixed segments 25, meshing with idle pinions 26, the latter meshing with racks 27 gpided in the opposite sides of the mac ine. Each rack has an offset arm 28, and these arms are rigidly connected by rear and forward crossbars 29, 30, disposed just beneath the computation bars 19, so that when any pins 18 are depressed, the rear cross-bar 29 may, when driven forwardly by handle 23, engage the depressed pins 18 and drive their bars 19 forwardly. The racks 20 thus turn the wheels 22, each to an extent dependent upon the pin depressed. Upon the return of the handle 27 of the general operator, the forward cross-bar 30 engages shoulders 31 upon said computation bars, to return them rearwardly to normal positions.

The lifting of the bars 19 to bring their pins within range of the key-operated linkages 17 'is effected by the letter-feeding carriage 7 of the typewriter. Upon the rear of the carriage is mounted a dog 32, to engage jacks 33, pivoted at 34 upon a bracket/and at their rear ends adapted to depress links 35, whose lower ends are pivoted at 36 to levers 37. These levers are adapted to op.- erate linkages 38 to lift the rear portions of the computation bars 19; these linkages forming a denomination-transposing device as usual in said Underwood-Hanson machine.

The parts above described are similar in function and operation to those shown in the British Patent, No. 3390, of 1912.

Each of the dogs 32 (of which several may be employed) is pivoted at 39 upon a block Or carrier 40, which is swiveled upon, and adjustable along a rod 41 fixed upon the carriage, and has a tooth 42 to look into any of a series of notches 43 formed at letter space intervals in a rod 44, also fixed upon the carriage. Each carrier with its dog 32 may be termed a tappet, and forms with the jacks '33 a part of the denominational selecting mechanism. By swinging the car- 32 at this time.

rier 40 up free of the rod or block 43, the block may be adjusted along said rod 44 and then reengaged with the rack.

The platen 6 is usually mounted upon a frame 45, which can shift up and down for writing upper-case and lower-case characters. Normally the lower-case types 46 strike the platen; but when the latter is shifted up, the upper-case characters 47 make the impressions. The figure types are included in the lower-case set 46; but when the capital shift key 48 is depressed, it is not desired to have any of the computing mechanism operate, as figures are not provided in the upper-case set of types 47. Mechanism is connected to the platen-shifting devices for silencing the computation dog The platen frame is usuall mounted on a pair of arms 49 hinge upon the carriage frame 7, and a rail 50 is employed for liftin the platen frame; the latter having a ro 51 to run upon said rail. Rail 50 is mounted upon a frame 52, which is operated by a key lever 53, said lever bearing the key 48; and the platen frame also usually comprises a rock shaft 54. Extending rearwardly from this rock shaftis an arm 55, having on its rear end a roll 56 to engage a cam arm 57 which depends from a rock shaft 58. Arms 59 extend up from said rock shaft 58, and carry at their tops a roll 60 to engage transversely a roll 61 on said dog carrier 40. The arms 59 and the roll 60 form a support which holds the dog and its carrier up while camming the jacks 33. The normal position of the parts will be seen at Fig. 1, in which the dog 32 and its carrier 40 are supported in effective elevated positions by the roll 60.

It will thus be seen that the roll 60 with its arms 59 automatically raises each tappet with its dog 32 to an effective position as the carriage comes into a computing zone. The roll 60 supports the tappet throughout the computing zone in its effective sition. The part 59, 60 then may be term a zonecontroller in that it determines each computing zone with the aid of a properly positioned tappet 32, 40 on the carriage. At times it is desirable to have the tappet and the denominational selecting mechanism silent even in a computing zone. To do this, the zone-controller 59, 60 is moved to an ineffective position so that the tappet 32, 40 will be in a depressed or ineffective position. Cases where this is desired will now be considered.

When the platen 6 is shifted up, the arm 59 is brought back, and by withdrawing the roll 60 permits the carrier 40 to drop, together with the dog 32, so that the latter drops below the jacks 33 and cannot operate them. Spring 61' holds the rock shaft 58 in this normal position. The releasable dog supporting roll 60 should be of a length equal to or greater than the width of the set of jacks 33 (see Fig. 2), so. as to hold the dog supported during thetime that the dog 32 is traversing the set of jacks. At 5 each end the releasable supporting roll 60 is provided with a cam, which may be in the form of a coned end 62 formed upon the roll. This cone serves to cam the carrier upwardly to normal position during the run of the carriage, if the releasable-roll 60 is in normal Fig. 1 position. The dog-roll 61 is preferably pointed or coned, as shown to facilitate operation thereon of the releaserroll 60. It will be understood that the releaser-roll does not need to rotate in all cases, nor is it always necessary to make an antifriction roll on the dog-carrier 40. By reason of the cam connection at 56, 57 it will be seen that it is possible to effect the releasing operation of the rock-shaft 58 without disturbing the arm 55, or the case-shifting mechanism to which it is connected.

Said Underwood typewriting machine usually is provided with a tabulating mechanism including a set of tabulating keys 63 and levers 64, fulcrumed at 65 and at their rear ends connected to raise decimal stops 66, which coiiperate with column stops 67 on the carriage. Upon each of the decimal stops is formed a shoulder 68. These shoulders engage a universal bar 69 fixed upon a rock shaft70, from which extends an arm 71, having a pin 72 extending within a slot 73 in a link 74:, whose upper end is pivoted at 75 to an arm 76, extending rearwardly from said rock shaft 58, so that whenever any decimal stop is lifted by its key 63, the releaser-roll or member 60 will be rocked backwardly to permit the dog carrier 40 to drop, thus preventing the rapid movement of the carriage from eflecting injury to the dog 32 or the jacks.

From the rock shaft 70 extends an arm 7 0 which is connected by an upstanding link 77 to a lever 78, which carries at its opposite end a roll 79 to take under the carriage-- feeding rack 9, and release the same from the control of the letter-feeding dogs, and permit it to run rapidly under the influence of its spring 8.

The carrier 40 is adjusted to a position to correspond with the position of the column stop 67 on the paper'carriage 7, and notwithstanding the fact that the tabulator key 63 silences dog 32, still it is true that upon the release of the tabulator key and the camming up of the carrier 40 by member 60, said dog 32 will engage and raise the over-lying jack 33, so that the release of said tabulator key occasions the raising of one of the computation-pin bars 19 to position for the setting of a pin thereon by a I1l1' meral key. The slot 73 in the link 74 permits the rock shaft 58 to be operated independently of the tabulator mechanism.

\ There is usually provided upon said Underwood typewriter a back-spacing mechanlsm, a portion of which is seen at Fig. 4, said portion consisting of a-key 80 and a part ofa lever 81, upon which said key is mounted. From the stem of said key proects a pin 82, which overlies the forwardlyextendmg portion 83 of lever 53, so that whenever the back-spacing key is operated, the shift-key is also depressed, and hence the mechanism is set in motion which swings the supporting roll 60 back, to release the dog 32 and permit it to drop. At this operation the case-shift mechanism shifts idly; but the carriage is set back a single letterspace, and upon the release of the backspacing key 80, the dog 32 will lift the corresponding jack 33. i

The pivoting of the dog 32 at 39 permits the latter to slip idly past the jacks durmg the return of the carriage. Owing to the pivoting of the dog at 39, there occurs considerable of the return motion of the carriage before said dog slips past the first jack at the right, Fig. 2. The back-spacing key does not step the carriage back so far; but by reason of the fact that the dog 32 is moved out of engagement with the jacks by means of the pin 82 on the back-spacing key the said dog 32 maintains its upright position as seen in dotted lines at Fig. 2, while traversing any jack during the time the back-space key is depressed, and upon release of said key 80, said dog will lift the overlying jack and hence the disadvantage of pivoting the dog at 39 is overcome.

'There is provided at the front of the adding machine a special key 85, which is used whenever it is desired to return all the dial wheels 22 tozero. From this key 85 extends rearwardly a rod 86, which has an inclined or cam-slot 87 working upon a pin 88 which is fixed in the machine frame, whereby the rear end of the rod 86 is thrust upwardly to engage a pin 89 upon a special bar 90; the last similar to 19, but having only a single pin 91, which, when the bar 90 is lifted, engages an abutment 92, and is checked thereby during the remainder of the ascent of the bar 90, whereby said pin 91 is set or projected below the bar 90. The key 85 is then released, and the bar 90 is subsequently carried forward by the general operator to set all the wheels to zero, in the well-known manner.

A connection is provided between said zero key 85 and the jack-silencing mechanism hereinbefore described, such that the operation of the zero key 85 will insure that the computation dog 32 is returned to its working position, in case it has been previously released by means of the special key or finger-piece 93. It will be seen that this key is provided upon the'forward portion of link 94, which is pivoted at its rear end to arm 95 of a bell crank 96; the other arm 97 of said bell crank having a wrist 98 to engage an arm 99 fixed on the rock-shaft 58. By pressing the finger-piece 93 backwardly, the arm 99 is caused to rock the shaft 58 and swing the roll 60 to let the computation dog 32 drop or become silenced; and a pin 99, which forms a stem for the finger-piece 93, may be dropped into a slot 100, formed in a side-plate 101 of the machine, thereby locking the computing mechanism out of use.

The connection before mentioned between the zero key 85 and the computation dog 32, comprises a lug 102 on the said zero-key rod 86, which, during the backward thrust of said rod, engages an arm 103 on rock shaft 104, to turn the latter, and thereby swing forwardly an arm 105, which extends up from said rock-shaft and has at its end a wrist 106, to engage a fin er 107 formed on the forward end of the llnk 94, to lift the same until the locking pin 99 is clear of the slot 100; a spring 108, on rock shaft 96, returning the bell crank 95, 97 to normal position, together with the link 94; the pin 99 sliding idly along a horizontal slot 109, which extends forwardly from slot 100. It

will thus be understood that the operator may at any time employ the finger-piece 93 to silence the computing mechanism, and may drop the pin 99 into the locking slot 100 to hold the computing mechanism out of use; while if the operator does not think to release the locking pin 100, the zero key will do so automatically.

The same unlocking result may also be accomplished by a special key 110, which is used to print a special character on the work-sheet, to show that the computing wheels all stand at zero. This key has a stem 111, to bear down on arm 112, which is loose on the rock shaft 104, but is fixed to an arm 113, which has a projection 114 to engage said arm 105, to cause the wrist 106 to lift the finger 107 and unlock the link 94, thus permitting the computation dog 32 to belifted, through the instrumentality o the spring, as in the other instance above mentioned. This key 110 causes a special type to print by the following means: Arm 113 has a pin-and-slot connection 115 with a bell crank 116, which has a rigidly extending arm 117 to depress a pin 118 on an arm 119. The last pulls down a link 120, that is connected to a special lever 121, corresponding to a key-lever 3, and having a bell-crank 4 to swing a type bar 5, to cause aspecial type to print on the worksheet against platen 6. Detents 122 are pressed by springs 123 into the notches of gears 124, one fixed to each dial wheel 22. When any dial wheel stands at zero, its detent sinks deeply into a special notch 125, so that an obstructing or locking arm 126 on the other end of said detent will be clear of a bar 127, which is connected by an arm 128 to said arm 113. If all the wheels stand at zero, the key 110 can be depressed by the typist; but if any wheel does not stand at zero, its locking arm 126 will remain in the path of the bar 127 to lock the special key 110 against actuation. In order to be able to print the special character on the worksheet, therefore, the operator must first see that the wheels all stand at zero.

It will be understood, therefore, that the operation of either of the special keys will cause the machine to be brought into condition for computation to be performed.

The advantage of having the special key 110 control the computation will be apparcut when considering the following example. If a date is inserted rior to the computation of an item, it is esirable to throw out the computing mechanism during the printing of the numbers forming part of the date. In order to be sure that the adding mechanism is clear before starting to compute, the key 110 is depressed to print the special character indicating that the wheels are clear. With the present construction, this operation of the key 110 puts the computing mechanism in condition to enable computation to be performed.

It will be noted that while the roll 60 has been described as a releasing roll, it normally supports the dog 32 in effective position in the adding zone. Since said roll 60 stands almost directly above the shaft 58 carrying it, any downward thrust of the acks 33 on the dog 32 will be transmitted to the shaft 58, and as said shaft 58 may be made heavy and may be supported ad'acent the roll 60, this shaft will almost rlgidly carry the load of the dog 32 in operating the jacks 33. Outside of the adding zone, it will be observed that the carriers 40 rest on the rod 44, but the tooth 42 is of such size that each carrler 40 is still engaged with the notch 43 and thus is held against slipping along the rod 41.

Variations may be resorted to within the scope of the invention, and portions of the nnprovemnts may be used without others.

Having thus described my invention, I claim:

1. The combination of a system of computation pins or devices, a carriage, a dog on said carriage, a set of pin-displacing ]acks on the machine frame and operable in successlon by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a releasing bar mounted on the machine frame, and extending in the direct1on of the run of the carriage, andmeans for operating said releasing bar to shift the dog away from all the jacks.

The combination of a system of computatlon .plIlS or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a releasing bar mounted on the machine frame, and extending in the direction of the run of the carriage, means for operating said releasing bar to shift the dog away from all the jacks, and said releasing bar having a cam-shaped end to cam the dog into working position by a movement of the carriage.

3. The combination of a system of' computation pins or'devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a releasing bar mounted on the machine frame, and extendingin the direction of the run of the carriage, and means for operating said releasing bar to shift the dog away from all the jacks, said releasing bar having cam shaped ends to cam the dog into working position by a movement of the carriage in either direction.

4:- The combination of a system of com-.

putation pins or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable 1n succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a releasing bar mounted on the machine frame, and extending in the direction of the run of the carriage, and means for operating said releasing bar to shift the dog away from all the jacks, said releasing bar being in the form of a roll having coned ends.

5. The combination of a system of computation pins or devices, acarriage, a dog on said carriage, a set of. pin-displacing jacks on the machine frame and operable in succession by said dog, a releasing bar on the machine frame, keys, means controlled by the keys to set any of the pins displaced by any jack, a carrier upon said carriage on which said dog is pivoted, and means for operating said releasing bar; said carrier engageable by said releasing bar to be moved thereby to carry the dog out of working position.

6. Thecombination of a system of compu-' tation pins or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a releasing bar on the machine frame, a carrier on which said dog is pivcted, and a rod upon said carriage along which said carrier is adjustable, and upon which it may be swung by said releaser bar to silence the said dog.

7. The combination of a system of comi putation pins or devices, a carriage, adog on said carriage, a set of pin-displacing jacks on the machine frame and operable in' succession by said dog, keys, means controlled by the keys to set any of the pins jacks on the machine frame and operated in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a releasing bar on the machine frame, a carrier on which said dog is pivoted and a rod upon said carriage along which said carrier is adjustable, and upon which it may be swung by said re= leaser bar to silence the said dog, said rod being provided with a rack, and said carrier having a tooth-to engage the rack, said carrier being rotatable upon said rod to permit the adjustment of the carrier and dog along the rack.

9. The combination of a system of computation ins or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a releasing bar mounted on the machine frame, and extending in the direction of the run of the carriage, means for operating said releasing bar to shift the dog away from all the jacks, said releasing bar being in the form of a rollhaving coned ends, a carrier upon said carriage on which said dog is pivoted, and means for operating said releasing bar; said carrier engageable by said releasing bar to be moved thereby to carry the dog out of working position, said releaser roll mounted upon a rocking frame, and said dog carrier having a roll engageable by said releaser roll.

10. The combination of a system of computation pins or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a releasing bar mounted on the machine frame, and extending in the direction of the run of the car riage, and means for operating said releas ing bar to shift the dog away from all the jacks, a case shift mechanism includingakey operated rock shaft, an arm upon said rock shaft and a rocking device upon which said jacks on the machine frame and operable in succession by said dog, keys, means con trolled by the keys to set any of the pins displaced by any jack, a releasing bar mounted on the maohineframe, and extending in the direction of the run of the carset of keys, means controlle riage, means for operating said releasing bar to shift the dog away from all the jacks,

'a case-shift mechanism, and means connected to said case-shift mechanism to operate said releaser bar.

12. The combination of a system of coniputation pins or "devices, a letter-feeding carriage, tabulating mechanism for said'carriage, a dog on said carriage, a set of pindisplacing jacks on the machine frame and operable in succession by said dog, a set of keys, means controlled by the keys to set any of the pins displaced by any jack, said tabulating' mechanism including a series of key-operated stops, a universal bar operable by any of said stops, a releaser for said dog, and a connection between said universal bar and said releaser.

13. The combination of a system of computation pins or devices, a letter-feeding carriage, tabulating mechanism for said carriage, a dog on said carriage,- a set of pindisplacing jacks on the machine frame and operable in succession by said dog, a set of keys, means controlled by the keys to set any of the pins displaced by any jack, said tabulating mechanism including a series of key-operated stops, a universal bar operable by any of said stops, a releaser for said dog, said universalbar mounted on a rock shaft, and a link connecting said releaser to said universal bar.

14. The combination of a system of computation pins or devices, a letter-feedin carriage, tabulating mechanism for sai carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable'in succession b by the keys to set any of the pins displaced by any jack, a universal barconnected to said tabulating mechanism for effecting separation between the dog and jacks, and a carriage releasing giechanism also operated by said universal 15.- The combination of a system of computation pins or devices, a letter-feeding carriage, a back-spacing mechanism for said carriage, including a key, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, said dog pivotally mounted to said dog, a

1,2ss,ou

jacks on the machine frame and operable in succession by said dog, keys, means controlled b the keys to set any of the pins displace by any jack, a releasing bar mounted on the machine frame, and extending in the direction of the run of the carriage, means for operating said releasing bar to shift the dog away from all the jacks, a case-shift mechanism, means connected to '.said case-shift mechanism to operate said releaser bar, a back-spacing key, and means to' enabl'e said back-spacing key to operate 'sald case-shift mechanism, to separate the dog from the jacks.

17. The combination of a letter-feeding carriage, a case-shift mechanism, a tabulator for said carriage, a back-spacing mechanism forsaid carriage, a d on said carriage, a set of computation PlIlS or devices, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, a set of keys, means controlled by said keys to set any of the pins displaced by said jacks, and means operable by either said case-shift mechanism, said tabulating mechanism, or said back-spacing mechanism, for effecting separation between the dog and jacks.

18. The combination of a letter-feeding carriage, a case-shift mechanism, a tabulator, for said carriage, a back-spacing mechanism for said carriage, a dog on said carriage, a set of computation pins or devices, a set of pin-lisplacing jacks on the machine frame and o erable, in succession by said dog, a set of 'eys, means controlled by said keys to set any of the pins displaced by said jacks, means operable by either said caseshift mechanism, said tabulating mechanism, or said back-spacing mechanism, for effecting separation between the dog and jacks, and means operable at will for effecting separation between the dog and jacks.

19. The combination of a letter-feeding carriage, a case-shift mechanism, a tabulator for said carriage, a back-spacing mechanism for said carriage, a dog on said carriage, a set of computation pins or devices, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, a set of keys, means controlled by said keys to set any of the pins displaced by said jacks, means operable by either said case'- shift mechanism, said tabulating mechanism, or said back-spacing mechanism, for effecting separation between the dog and jacks, and means operable at will for effecting a separation of one of said do and jack elements from the other, and ocking it there.

20 The combination of a system of computation pins or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, shiftable means for effecting separation at will between the dog and jack elements to prevent operation of the jack by the dog when writing figures, and means to lock said shiftable means in effective position.

21. The combination of a system of computation pins or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, means to lock the dog out of working position, a zero key for the dial wheels, and means operable by said zero key for'releasing said dog and causing it to return to effective position.

22. The combination of a system of computation pins or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, shiftable means for effecting separation at will between the dog andjack elements to prevent operation of the jack by the dog when writing figures, means for locking said shiftable means in effective position, a special key,'a typeoperable by said" special key only when all the dial wheels stand at'zero, and means controlled by said special key for releasing the lock, I 23. The combination of a system of com putation pins or devices, acarriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by-said dog, keys, means controlled by the keys to at any of the pins displaced by any jack, a bell crank, a spring, means operable by said spring, through said bell crank for holding said dog in effective position, a link connected to an arm on said bell crank, to turn the latter to release said dog, a pin to lock said link in dog-releasingposition, and a zero key having means to unlatch the pin. 24. The combination of a system of computation pins or devices, a carriage, a dog on said carriage, a set of pin-displacing jacks on the machine frame and operable in succession by said dog, keys, means controlled by the keys to set any of the pins displaced by any jack, a bell crank, a spring, means operable by said spring through said bell crank for holding said dog in effective position, a link connected toan arm on said bell crank, to turn the latter to release said dog, a pin to lock said link in dog-releasing pos1- tion, a zero key having means to unlatch the pin, a special key, a' type operable by said special key only when all the dial wheels stand at zero, and means controlled by said special key to release the locking pin.

25. In a combined typewriting and computing machine, thecombination with computing mechanism, of a denominational selector dog for said computing mechanism, a release for said dog-and a lock for said release, a special key and a special type connected. to said key to be operated when all g of said Wheels are at zero, and means whereby said special key may operate said lock.

26. In a combined typewriting and computing machine, the combination with a traveling carriage and a series of jacks, there being one jack for each denomination in which computing is done, of a dog caused to engage said jacks serial/i111, by movement of the carriage, said dog being normally in ineffective position, and means for positively puting machine, the combination with a,

traveling] carriage: .andf au series I of jacks, there being one jack for" each denomination in which computing is" done, of'a dog caused to engage said jacks sem'atz'm by movement of the carriage, said dog being normally in inefiective position, means for positively moving said dog into efi'ectivecposition when said carriage reaches an adding zone, tabulating keys for positioning said carriage, and means for moving said dog to ineffective position by the operation of a tabulating key.

29. In a combined typewriting and com puting machine, the combination with a traveling carriage and a series of jacks, there being one jack for each denomination in which computing is done, of a dog caused to engage said jacks sem'atim by movement of the carriage, said dog being normally in inefiective position, means for positively moving said dog into effective position when said carriage reaches an adding zone, a caseshift mechanism, and means for moving said dog to an ineffective position when said case shift is operated.

30. In a combined typewriting and comdog on'said pivot toeifectiveposition to engage said jacks sem'utim by movement of the carriage, said dog being normally in.

ineffective position, means for positively moving said dog into effective position when said carriage reaches an adding zone, a gang of dial wheels, a key for returning said dia wheels to zero, a lockfor holding said dog in ineffective position, and means for releasing said lock by the operation of said zero 31. In a combined typewriting and computing machine, the combination with a traveling carriage and a series of jacks, there being one 1' ack for each denomination in which computing is done, of a dog caused to engage said jacks scriatim by movement of the carriage, said dog being normally in ineffective position, means for positively moving said dog into effective position when said carriage reaches an adding zone, a key for locking said dog in ineffective position, a gang of dial wheels, a special type, a key for operating said special type operable only when said dial wheels are at zero, and means for moving said dog to effective position by the operation of said special key.

32. In a combined typewriting and computing machine, the combination with a traveling carriage, a series of jacks, there being one jack for each denomination, and a dog for operating said jacks seriatim as said carriage moves along, of a carrier for said dog on which it normally swings to an ineffective position, and a support for said dog supporting it in effective position inthe adding zone.

33. In a combined typewriting and ,computing machine, the combination with a traveling carriage, a series of jacks, there being one jack for each denomination, and a dog for operating said jacks seMati/m as said carriage moves along, of a carrier for said dog on which it normally swings to an ineffective position, a rock \shaft, .arms on said rock shaft, a support for said carrier mounted on said rock shaft and adapted to take the thrust of said carrier, and means for swinging said rock shaft to carry said supporting means clear of said carrier.

34. In a combined typewriting and computing machine, the combination with a traveling carriage, a series of jacks, therebeing one jack for each denomination, and a dog for operating said jacks seriati'm, as said carriage moves along, of a carrier for said dog on which it normally swings to an inefiective position, a rock shaft, arms on said rock shaft, a support for said carrier mounted on said rock shaft and adapted to take the thrust of said carrier, means for swinging said rock shaft to carry said supporting means clear of said carrier, and a roll on said carrier by which it engages said supporting means.

In a combined typewriting and computing machine, the combination with a travehng carriage, a series of jacks, there being one jack for each denomination, and a dog for operating said jacks scm'atim as said carriage moves along, of a carrier for said dog on which it normally swings to an ineffective position, a rock shaft, arms on said rock shaft, a support for said carrier mounted on said' rock shaft and adapted to take the thrust of said carrier, means for swinging said rock shaft to carry said supporting means clear of said carrier, and a roll on said supporting means by which it engages said carrier.

36. In a combined typewriting and computing machine, the combination with a traveling carriage and a dog thereon, of a carrier for said dog, a rod along which said dog is slidable, means for locking said dog against sliding on said rod, a series of jacks forming denominational members, and means for automatically raising said dog from an ineffective to an effective osition when it is in alinement with said acks.

'37. In a combined typewriting and computing machine, the combination with numeral keys and computing wheels, of a traveling carriage, a dog on said carriage normally in an ineffective position, a series of jacks operable by said dog when in effective position, means for raising said dog and supporting it in effective position when opposite said jacks, a lock for holding said supporting means in ineffective position, and a system of freely swinging linkages always opera-ted ineffectively by said numeral keys when said dog is locked.

38. In a combined typewriting and computing machine, the combination with a traveling carriage and a dog pivoted thereon, of jacks operableby said dog when it is in effective position, a rock shaft comprising a member on rock arms adapted to be swung under said dog and support it, a spring holding said supporting member in effective position so that the thrust of the dog is substantially vertical on said rock arms, and means connected to certain keys of the typewriter for swinging said r arms against the tension of said spring s that said supporting means is in ineffective position.

In a combined typewriting and computing machine, the combinatlon with a traveling carriage and a dog pivoted thereon, of jacks operable by said dog when it is in effective position, a rock shaft comprising a member on rock arms adapted to be swung under said dog and support it, a spring holding said supporting member in effective position so that the thrust of the dog is su stantially vertical on said rock arms,

and a rock arm fast on said rock shaft for swinging said supporting means against the 5 tension of said spring by the operation of a key of the typewriter mechanism.

40. ha combined typewriting and computing machine, the combination with a travelm carriage and a dog pivotally mounte thereon, of a series of jacks, a support adapted to be swun under said dog to receive the thrust thereo directly, a platen in said traveling carriage, a shift rail for shifting said platen to change the case of writin and a unitary connection between said s ift rail and said dog support for swinging the support to ineffective position when said shift rail is operated.

' 41. In a combined typewriting and com- 20 puting machine, the combination with a traveling carriage and a dog thereon, of a series of jacks adapted to be operated by said dog when in effective posltion, rock arms carrying a member supporting said dog in effective position so t at sal arms receive substantially the whole thrust of said dog, and a spring which may be comparatively light for moving said rock arms to their effective position.

42. In a combined typewriting and computing machine, the combination with a traveling carriage and a. dog thereon of a pivot on which said do swings, jacks positively moved by said og in one direction .831 and moving said dog on its ivot in the opposite direction, a support or said dog adapted to be swun to inoperative position,

a back-space key or said typewriter, and

a connection between said support and said '40) back-space key such that t e carriage is moved back when the dog is clear of said jacks so that said jacks when moved back by said dog are not swung on their ivots.

43. In a combined typewriting an com- '451puting machine, the combination with a traveling carriage and a dog ivoted thereon, of a series of jacks adapte to be moved seriatim by said dog when it is in effective position, a supportlng member so holding said dog, means for setting said supporting member to ineffective posltion, a releasing arm for releasing said locking means an independently operable connections between said releasing arm, a zero key, and a special character key operable when the computing mechanism is set at zero.

44. In a combined typewriting and computing machine, the combination with a travehng carriage and a series of jacks, of

60 a dog for operating said jacks seriatim as said carriage trave s, a support normally holding said dog efiective, means for locking said dog to ineffective position, a special 4 character key 0 erable to print a character i g that e semp ng mechanism s cleared, and means for releasing said look by operation of said special key.

45. In a combined typewriting and com puting machine, the combinatlon. with a traveling carriage, of a rod on said carriage, a dog carrier slidable along said rod, a tooth on said carrier, notches into which said tooth may enter to lock the carrier against sliding, a series of jacks with reference to which said dog is normally ineffective, and a support normally held under said dog, for holdmg it in effective position, said carrier engaging said notches both in the efiective and ineffective positions of said carrier.

46. In a combined typewriting and computing machine, the combination with numeral keys and rack bars in which numbers are temporarily recorded by said keys, of a traveling carriage, dogs movable along said carriage for selecting said rack bars, said dogs being normally ineffective, and means for moving said dogs between effective and ineffective positions.

47. In a combined typewriting and computing machine, the combination with n11- meral keys and a traveling carriage, of. a denominational selecting means associated with said carriage and controlling said computing mechanism, a key for printin a character to show when the computlng mechanism stands at zero, means controlled from said key for rendering said denominational selecting means effective, and a plurality of keys for controlling said carriage and renderin said denominational-selecting means ine ective during their control of the carriage.

48. In a combined typewriting and computing machine, the combination with computing mechanism, of a denominational selector dog for controlling said computing mechanism, manual means for renderin said dog inoperative at will to control said computin mechanism, a special type operable to in icate a zero condition of said computing mechanism, and means controlled by the operation of said special typeto print, to dominate the control of said selector dog and to render the same effective even though the same has been moved to ineffective position b said manual control.

49. n a combined typewriting and computing machine, the combination with a traveling carriage, of a dog settable at letter-space intervals thereon, a carrier for said dog normally holding it in ineffective position, a rest for said carrier, a support for said dog normally raising it to efi'ectlve position in the adding zone, a tabulating key, and means for moving said support to inefi'ective position when said tabulating key is operated. I

50. In a computing machine, the combination with a carrier and an anti-friction roll thereon, of a support for said carrier mov 130 ing transversel thereto, and an anti-friction roll by whlch said support engages said carrier.

51. In a computing machine, the combination with a denomination selecting dog, of a carrier for said dog, an anti-friction roll for said carrier bys which it may be supported as it trave along, a carnage for causin it to so travel, a support for said roll a apted to be swung transversely into and out of effective posltion, and an antifriction roll by which said support engages said first named anti-friction roll.

52. In a computing machine, the combination with a series 0 denominational jacks, of a traveling carriage, a dog for moving said jacks seriattm, a carrier for said dog pivoted on said carriage, a roll on said carrier, a sup ort for said carrier adapted to hold said 0g in effective position while it is traversing said jacks, and a roll on said support by which it engages said carrier when it is swung into and out of efiective position.

53. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of computing wheels, a denominationselecting dog associated with said carriage, said dog adapted to be either in efi'ective or inefl'ective position, a key adapted to print a character to show that the computing wheels stand at zero, means under the control of said key for automatically making said dog effective, a tabulating device for said carriage, and means for making said dog ineflective when said tabulating device is effective.

54. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of computing wheels, a denomination-selecting dog associated with said carriage, said dog adapted to be either in efiective or inefi'ective position, a key adapted to print a character to show that the computing wheels stand at zero, means under the control of said key for automatically making said dog effective, a back-space device for said carriage, and means for making said dog ineffective when said back-space device is effective.

55. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of computing wheels, a denomination-selecting dog associated with said carriage, said dog adapted to be either in efl'ective or ineflective position, a key adapted to print a character to show that the computing wheels stand at zero, means under the control of said key for automatically making said dog effective, a case-shift device, and means for making said dog inefi'ectiye when sa d 0. 1 shift is effective.

56. In a combined typewriting and computing machine, the combination with numeral keys and a traveling carriage, of a normally inefiective denomination dog, computing wheels, a key for returning said computing wheels to zero, a key for printing a sign to show that the computing wheels stand at zero, means connected to said last mentioned key for making the denomination dog efiective, and devices other than the numeral keys for being eflective on the carriage of said typewriter and adapted to automatically make said dog ineffective while stands at zero, means automatically operated by said sign-printing key for making the printing keys effective to compute, and a key adapted to return said computing mechanism to zero, said key also acting to make said printing keys efiective to compute.

59. In a computing machine, the combination with computing mechanism and numeral keys adapted to print without computing, of a key1 adapted to print a sign showing that t e computing mechanism stands at zero, a carriage forming part of said computing mechanism and including denomination-selecting means, and means automatically operated by said sign-printing key for making the printing keys effective to compute, said automatic means acting on said denomination-selecting-means.

60. The combination with a typewriting mechanism, of a computing mechanism connected to be operable thereby, means for silencing the computing mechanism connec tion at will so that the typewriting mechanism may operate without computing, means for printing upon a work-sheet in the typewriter, a character to indicate that the computing mechanism stands cleared, and means connected to said printing means for restoring connection between the computing mechanismi and the typewriting mechanism, so that the computing mechanism will operate at the operation of the typewriting mechanism.

61. The combination with a typewriting mechanism, of a computing mechanism connected to be operable thereby, means for silencing the computing mechanism connection at w ll so that the typewriting mechanism may operate without computing, means for printing upon a work-sheet in the typewriter, a character to indicate that the computing mechanism stands cleared, means connected to said printing means for restoring connection between the computing mechanism and the typewriting mechanism, so that the computing mechanism will operate at the operation of the typewriting mechanism, and a separate key for zeroizing the computing mechanism, also acting on said connections to restore them.

62. The combination with a series of computation devices a carriage, a dog on said carriage, a set of device-displacing jacks on the main frame and operable in succession by said dog, keys, figure types operated by said keys, means controlled by the keys to set any device displaced by any jack, shiftable means for effecting a separation at will between the dog and ack elements to revent operation of the ack by the dog w en writing figures, and a finger-piece settable to make said separation effective.

63. The combination with a typewritng mechanism, of a computing mechanism connected to be operable thereby, means for silencing the computing mechanism connection at will so that the typewriting mechanism may operate without computin means for printing upon a work-sheet in t e typewriter, a character to indicate that the computing mechanism stands cleared, means connected to said printing means for restoring connection between the computing mechanism and the typewriting .mechanism, so

that the computing mechanism will operate at the operation of the typewriting mechanism, a separate key for zeroizing the computing mechanism, and means whereby said zeroizing key 0 crates said printing means.

64. In a com ined typewriting and computing machine, the combination with typewriting mechanism and computmg mec nism, of a zero key for returning the computing mechanism to zero, a clearance provmg key, a type connected to be, operated by sa1d clearance proving key, and means whereby the zero key operates said type without operating the clearance proving key.

65. In a combined typewriting and computing machine, the combination with typewriting mechanism, of computing mechanism, means for making said typewrlt ng mechanism effective on said computmg mechanism, manually-operable means controlling the efir'ectiveness of said means, azero key for said computing mechanism, and a special printing key, both of said keys acting through said manually-operable means to control the eifectiveness of said means for making the typewriting mechanism effective on the computmg mechanism.

66. In a comblned typewriting and computing machine, the combination with computing mechanism, of a typewriting mecha- I msm mcludin a carriage, a back-space key and a case shift key for said carriage, connectlons whereby the effectiveness of the carriage on said computing mechanism is conrolled, and means whereby the-back-space key operates the shift key to make said connectlons effective. 67. In a combined typewriting and computing machine, the combination with denomination members, of a pivoted dog adapted to 0am said members when moving in one direction, a pivot on which said dog swings, so that it passes by said members idly when moving 1n the reverse direction, a support for said dog a backspace key for moving said dog in t e reverse direction, and means for moving said support to ineifective posit1on automatically when said back-s ace key is operated to carry the do free 0 the denomination members so t at it will not swing on its pivot.

68. In a combined typewriting and computing machine, the combination with a traveling carriage and denomination members, of a denomination dog eflective to select said denomination members in letterfeedi'ng direction and ineffective in the opposite direction, a pivot on which said dog swings, a back-space key for moving said dog opposite to letter-feeding direction, and means connected to said back-space key to automatically move said dog clear of said denomination members to preserve its alinement during back-spacing.

69. The combination with a traveling carriage, of a tabulating mechanism for said carriage, computing mechanism, a, denominational selecti g battery for said computing mechanism including a series. of jacks, a tappet for actuating said jacks, and a roller controllable from said tabulating mechanism for determining the effectiveness of said tappet to operate said jacks.

70. The combination with a traveling carriage, of a tabulating mechanism for said carriage, computing mechanism, denominational selecting mechanism for said computing mechanism including a series of jacks, a traveling tappet for actuating said jacks, a support for holding said tappet to its work when in a computing zone, and silencing means operable from said tabulatin mechanism for disabling said denominational selecting mechanism when the former is in ac tion.

71. The combination with .computing mechanism, of a traveling carriage, denominational selecting mechanism for said computing mechanism including a series of acks, a tappet for said jacks and travel,- ing with said carriage, and a zone-controller for maintaining said tappet in an efiective position while said tappet is in a computing zone. I

72. The combination with a computing mechanism, oil a denominational selecting mechanism for said computing mechanism including a series of jacks and a traveling tappet for said jacks, a traveling carriage carrying said tappet, and a zone-controller for bringing said traveling tappet automatically to an effective position with respect to sai jacks whensaid carriage comes into a computing zone. o

73. The combination with a computing mechanism, of a denominational selecting mechanism for said computing mechanism including a series of jacks an a traveling tappet for said jacks, a traveling carriage carrying said tappet, a zone-controller for bringing said traveling tappet automatically to an effective osition with respect to Silld jacks when said carriage comes into a comuting zone, and means for silencing said tappet through the intermediary of said zone-controller when in a computing zone.

74. The combination with a computing mechanism, of a traveling carriage, a denominational selecting mechanism including a series of jacks and a tappet arranged to be brought seriatim into engagement with said jacks by the travel of said carriage which carries said tappet, a zone-controller for automatically bringing said tappet to an effective position with respect to said jacks when said carriage enters a computing zone, and silencing means efiective to render said tappet ineflective with respect to said jacks when said carriage has some other movement than a step-by-step movement.

75. The combination with a computing mechanism, of a traveling carriage, denominational selecting mechanism for said computing mechanism including a part carried by said carriage, a zone-controller lying in the path of such part and normally acting to automatically bring said traveling part from an ineffective position to an effective position when said carriage comes into a computing zone.

76. The combination with a computing mechanism, of a traveling carriage, denominational selecting mechanism for said computing mechanism including a part carried by said carriage, a zone-controller lying in the path of such part and normally acting to automatically bring said traveling part from an ineffective position to an effective position when said carriage comes into a computing zone, and silencing means for said zone-controller efit'ective even when said carriage is in a computing zone, to render said traveling art passive,

77. The combination with a computing mechanism, of a traveling carriage, denominational selecting mechanism including a part carried by said carriage, a zone-controller for rendering said part automatically enters a computing zone by shifting r1a c said part carried by said carriage, tabulating mechanism for said carriage, and silencing means for said part controlled from said tabulating mechanism and acting by rendering said zone-controller inefiective.

79. The combination with a computing mechanism, of a tabulating mechanism including a traveling carriage and case-shift mechanism for determining the writing of different case characters, a denominational selecting mechanism for said computin mechanism including a part carried'by sai carriage, and a zone-controller lying in the path of said part to shift the same automatically and thus render said denominational selecting mechanism effective when said carriage enters a computing zone.

80. The combination with a computing mechanism, of a typewriting mechanism including a traveling carriage, for determining different computing zones or columns, selecting means for accordin the denominations as computed by said computing mechanism with the denominations as written by said typewriting mechanism, means for supporting said selecting means in efl'ective position when writing numbers in a computin zone or column, and means for withdrawing said supporting means at all other times.

81. The combination with a computing mechanism, of a typewriting mechanism including a traveling carriage, zone-controlling means cooperating with said carriage during the traveling movement thereof to determine the active periods of said computing mechanism to correspond with the computing zones or columns as determined by the several positions of said carriage, and automatic means for rendering said zone-controlling means inactive while in a 83. In a combined typewriting and computing machine, the combination with computing mechanism including computing members, and a typewriting mechanism including a carriage having a step-by-step movement to control the denominational orders of the computing members, of! a pivoted dog controlled by the carriage in its step-by-step movement, means engaged by said dog when in its normal position for enabling the step-by-step movement of said carriage to effect the denominational orders of the computing members, said dog swinging on its pivot to permit the reverse movement of said carriage, and means for effecting a separation between said dog and the means engaged thereby during said reverse movement, to enable said dog to swing to normal position, and to thereby become effective on said engaging means when said separating means ceases to act.

84. The combination with a, computing mechanism, of a typewriting mechanism including a traveling carriage, a tappet car ried by said carriage for according the denominations as computed with the denominations as typewritten by said typewriting mechanism, said tappet being movable between efiective and ineifective positions, means for shifting said tappet, and means for efi'ecting backward movement of said carriage and concomitantly rendering said tappet-shifting means ineifective.

85. The combination with a computing mechanism, of a typewriting mechanism including a traveling carriage having an advancing movement and a returning movement, selecting means for according the denominations as computed by said computing mechanism with the denominations as written by said t pewriting mechanism, controlling means or governing the effectiveness of said selecting means, and automatic means operating to effect backward movement of said carriage, and to govern the effectiveness of said controlling means.

86. The combination with a computing mechanism, of a typewriting mechanism including a travelin carriage, tabulating mechanism for sai carriage, denominational selecting means for said computing mechanism, means for moving said carriage backwardly, and means for silencing said selecting means, said silencing means efiective from either said tabulating mechanism or from said means which moves the carriage backwardly.

JOHN N. THORNTON.

Witnesses:

GEORGE E. Mnwme, C. RIPLEY. 

